Republican presidential candidate Sen. Marco Rubio (R-FL) speaks at the Heritage Foundation April 15, 2015 in Washington, DC. Rubio took part in a discussion on 'The Case for the Lee-Rubio Tax Reform Plan.'

Republican presidential candidate Sen. Marco Rubio (R-FL) speaks at the Heritage Foundation April 15, 2015 in Washington, DC. Rubio took part in a discussion on 'The Case for the Lee-Rubio Tax Reform Plan.'

The Elton John AIDS Foundation and UNAIDS Breakfast

Michael Kovac

U.S. Senator Marco Rubio (R-FL), UNAIDS Executive Director Michel Sidibe, and Sir Elton John meet after The Elton John AIDS Foundation and UNAIDS breakfast at the Russell Senate Office Building on July 24, 2012 in Washington, DC.

U.S. Senator Marco Rubio (R-FL), UNAIDS Executive Director Michel Sidibe, and Sir Elton John meet after The Elton John AIDS Foundation and UNAIDS breakfast at the Russell Senate Office Building on July 24, 2012 in Washington, DC.

Marco Rubio Launches Presidential Bid In Miami

Joe Raedle

Sen. Marco Rubio (R-FL) waves to supporters after announcing his candidacy for the Republican presidential nomination during an event at the Freedom Tower on April 13, 2015 in Miami, Florida. Rubio is one of three Republican candidates to announce their plans on running against the Democratic challenger for the White House.

Sen. Marco Rubio (R-FL) waves to supporters after announcing his candidacy for the Republican presidential nomination during an event at the Freedom Tower on April 13, 2015 in Miami, Florida. Rubio is one of three Republican candidates to announce their plans on running against the Democratic challenger for the White House.

Marco Rubio Launches Presidential Bid In Miami

Joe Raedle

Sen. Marco Rubio (R-FL) stands with his wife, Jeanette Rubio, after announcing his candidacy for the Republican presidential nomination during an event at the Freedom Tower on April 13, 2015 in Miami, Florida. Rubio is one of three Republican candidates to announce their plans on running against the Democratic challenger for the White House.

Sen. Marco Rubio (R-FL) stands with his wife, Jeanette Rubio, after announcing his candidacy for the Republican presidential nomination during an event at the Freedom Tower on April 13, 2015 in Miami, Florida. Rubio is one of three Republican candidates to announce their plans on running against the Democratic challenger for the White House.

Senate Republican Nominee Marco Rubio's Wife Cast Her Vote

Joe Raedle

Republican Senate candidate Marco Rubio laughs as he speaks to the media while waiting for his wife Jeanette Rubio to cast her ballot at an early voting location on October 22, 2010 in Hialeah, Florida. Rubio is the front runner in the Florida Senate race against his opponents, Independent candidate and Florida Gov. Charlie Crist and Democratic candidate Rep. Kendrick Meek (D-FL).

Republican Senate candidate Marco Rubio laughs as he speaks to the media while waiting for his wife Jeanette Rubio to cast her ballot at an early voting location on October 22, 2010 in Hialeah, Florida. Rubio is the front runner in the Florida Senate race against his opponents, Independent candidate and Florida Gov. Charlie Crist and Democratic candidate Rep. Kendrick Meek (D-FL).

Marco Rubio Discusses FL Ebola Preparedness At Miami Int'l Airport

Joe Raedle

Sen. Marco Rubio (R-FL) speaks to the media about the state of Floridas Ebola preparedness during a visit to the Miami International Airport on October 16, 2014 in Miami, Florida. Rubio expressed his concerns about the spreading of the Ebola virus and the need for adequate prevention.

Sen. Marco Rubio (R-FL) speaks to the media about the state of Floridas Ebola preparedness during a visit to the Miami International Airport on October 16, 2014 in Miami, Florida. Rubio expressed his concerns about the spreading of the Ebola virus and the need for adequate prevention.

Sen. Rubio (R-FL) Discusses Obama's Shift In Cuba Policy

T.J. Kirkpatrick

Sen. Marco Rubio (R-FL) reacts to U.S. President Barack Obama's announcement about revising policies on U.S.-Cuba relations on December 17, 2014 in Washington, DC. Rubio called the President a bad negotiator and criticized what he claimed was a deal with no democratic advances for Cuba.

Sen. Marco Rubio (R-FL) reacts to U.S. President Barack Obama's announcement about revising policies on U.S.-Cuba relations on December 17, 2014 in Washington, DC. Rubio called the President a bad negotiator and criticized what he claimed was a deal with no democratic advances for Cuba.

Marco Rubio Launches Presidential Bid In Miami

Joe Raedle

U.S. Sen. Marco Rubio (R-FL) stands with his wife, Jeanette Rubio, and children after announcing his candidacy for the Republican presidential nomination during an event at the Freedom Tower on April 13, 2015 in Miami, Florida. Rubio is one of three Republican candidates to announce their plans on running against the Democratic challenger for the White House.

U.S. Sen. Marco Rubio (R-FL) stands with his wife, Jeanette Rubio, and children after announcing his candidacy for the Republican presidential nomination during an event at the Freedom Tower on April 13, 2015 in Miami, Florida. Rubio is one of three Republican candidates to announce their plans on running against the Democratic challenger for the White House.

Sen. Marco Rubio (R-FL) addresses the New Hampshire Rockingham Committee Freed Founder's Dinner on May 9, 2014 in New Castle , New Hampshire. Rubio visited the state as he weighs a 2016 presidential run.

Sen. Marco Rubio (R-FL) addresses the New Hampshire Rockingham Committee Freed Founder's Dinner on May 9, 2014 in New Castle , New Hampshire. Rubio visited the state as he weighs a 2016 presidential run.

Sens. Rubio (R-FL) And Nelson (D-FL) Meet With Members Of Miami-Area Venezuelan Community

Joe Raedle

Senator Marco Rubio (R-FL) speaks to the media in front of a wall dedicated to the victims of the violence in Venezuela as he shows support for the Venezuelan community at the El Arepazo 2 Restaurant on April 17, 2014 in Doral, Florida. Rubio and Senator Bill Nelson (D-FL) spoke about the need for the United States to support the opposition in Venezuela against Venezuelan President Nicolas Maduro.

Senator Marco Rubio (R-FL) speaks to the media in front of a wall dedicated to the victims of the violence in Venezuela as he shows support for the Venezuelan community at the El Arepazo 2 Restaurant on April 17, 2014 in Doral, Florida. Rubio and Senator Bill Nelson (D-FL) spoke about the need for the United States to support the opposition in Venezuela against Venezuelan President Nicolas Maduro.